Subtract 81/56 from 21/35
1st number: 21/35, 2nd number: 1 25/56
21/35 - 81/56 is -237/280.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 35 and 56 is 280
Next, find the equivalent fraction of both fractional numbers with denominator 280 - For the 1st fraction, since 35 × 8 = 280,
21/35 = 21 × 8/35 × 8 = 168/280 - Likewise, for the 2nd fraction, since 56 × 5 = 280,
81/56 = 81 × 5/56 × 5 = 405/280 - Subtract the two like fractions:
168/280 - 405/280 = 168 - 405/280 = -237/280
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